And he wants lots and lots of goes on the Big Thunder Mountain Railroad –a ride he loved on a previous Disney World trip with the Make A Wish Foundation.

Ben and Cameron have also come up with a joint bucket list, including meetings with Sir David Attenborough, Harry Hill and the stars of Top Gear.

Sheryl said: “They’re obsessed with Top Gear. When Cameron last got his hair cut, he wanted it like James May’s.”

Alan and Sheryl were high school sweethearts who met again through their sons’ shared illness. They hope their planned trips will help Alan’s daughter Phoebe, six, and their own little girl Layla, two, cope with the pain of Ben and Cameron’s health problems.